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我使用react-native来构建地图应用程序.我使用的api来自以下链接:https://github.com/lelandrichardson/react-native-maps.下面是我在我的应用上带来地图的代码.我徘徊如何在该地图上给出缩放值.以及当用户单击地图上的按钮时,如何更改缩放值.我应该使用什么缩放API来实现这一目标？

import React, {


AppRegistry,
  Component,
  StyleSheet,
  Text,
  View,
  Image,
  ListView,
  TextInput,
  TouchableHighlight,
  Dimensions,
 //MapView,
} from 'react-native';

import MapView from 'react-native-maps';

const styles = StyleSheet.create({
  map: {
    position: 'absolute',
    top: 0,
    left: 0,
    right: 0,
    bottom: 0,
  },
  container: {
    flexDirection: 'row',
    justifyContent: 'space-between',
    padding: 30,
    flex: 1,
    alignItems: 'center'
  },
  inputText: {
    height: 36,
      padding: 4,
      marginRight: 5,
      flex: 4,
      fontSize: 18,
      borderWidth: 1,
      borderColor: '#48BBEC',
      borderRadius: 8,
      color: '#48BBEC'
  }
});

class MapPage …